A 28 GHz Linear Power Amplifier Based on CPW Matching Networks with Series-Connected DC-Blocking Capacitors

Xia, Qingzhen; Li, Dongze; Huang, Jiawei; Li, Jinwei; Chang, Hudong; Sun, Bing; Liu, Honggang

doi:10.3390/electronics9040617

Open AccessArticle

A 28 GHz Linear Power Amplifier Based on CPW Matching Networks with Series-Connected DC-Blocking Capacitors

by

Qingzhen Xia

^1,2

,

Dongze Li

^1,2,

Jiawei Huang

^1,2,

Jinwei Li

^1,2,

Hudong Chang

¹,

Bing Sun

¹ and

Honggang Liu

^1,*

¹

High-Frequency High-Voltage Device and Integrated Circuits R&D Center, Institute of Microelectronics, Chinese Academy of Sciences, Beijing 100029, China

²

School of Microelectronics, University of Chinese Academy of Sciences, Beijing 100029, China

^*

Author to whom correspondence should be addressed.

Electronics 2020, 9(4), 617; https://doi.org/10.3390/electronics9040617

Submission received: 14 March 2020 / Revised: 3 April 2020 / Accepted: 4 April 2020 / Published: 6 April 2020

(This article belongs to the Special Issue CMOS Power Amplifier Design and Applications)

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Abstract

In this paper, the influence of the DC-blocking capacitors leveraged in coplanar waveguide (CPW) matching networks is studied. CPW matching networks with series-connected DC-blocking capacitors are less sensitive to capacitance and are adopted in a 28 GHz power amplifier (PA). The PA targeting fifth-generation (5G) phased array is developed in 90 nm silicon-on-insulator complementary-metal-oxide-semiconductor (SOI CMOS) technology. A stacked field-effect-transistor (FET) architecture is elected in the output stage to boost the output power and reduce the die area. The PA with a core area of 0.31 mm² demonstrates a maximum small signal gain of 13.7 dB and a −3 dB bandwidth of 6.3 GHz (22.9–29.2 GHz). The PA achieves a measured saturated output power (P_sat) of 14.4 dBm and a peak power added efficiency (PAE) of 25% for continuous wave signals. At 24/25.6/28 GHz, the PA achieves +7.87/+9.16/+10.7 dBm measured output power and 6.21%/8.11%/10.17% PAE at −25 dBc error vector magnitude(EVM) for a 250 MHz-wide 64-quadrature amplitude modulation (64-QAM). The developed linear PA provides a great potential for low-cost 5G phased array transceivers.

Keywords: CPW matching networks; DC-blocking capacitors; power amplifier; mm-Wave; 5G

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MDPI and ACS Style

Xia, Q.; Li, D.; Huang, J.; Li, J.; Chang, H.; Sun, B.; Liu, H. A 28 GHz Linear Power Amplifier Based on CPW Matching Networks with Series-Connected DC-Blocking Capacitors. Electronics 2020, 9, 617. https://doi.org/10.3390/electronics9040617

AMA Style

Xia Q, Li D, Huang J, Li J, Chang H, Sun B, Liu H. A 28 GHz Linear Power Amplifier Based on CPW Matching Networks with Series-Connected DC-Blocking Capacitors. Electronics. 2020; 9(4):617. https://doi.org/10.3390/electronics9040617

Chicago/Turabian Style

Xia, Qingzhen, Dongze Li, Jiawei Huang, Jinwei Li, Hudong Chang, Bing Sun, and Honggang Liu. 2020. "A 28 GHz Linear Power Amplifier Based on CPW Matching Networks with Series-Connected DC-Blocking Capacitors" Electronics 9, no. 4: 617. https://doi.org/10.3390/electronics9040617

APA Style

Xia, Q., Li, D., Huang, J., Li, J., Chang, H., Sun, B., & Liu, H. (2020). A 28 GHz Linear Power Amplifier Based on CPW Matching Networks with Series-Connected DC-Blocking Capacitors. Electronics, 9(4), 617. https://doi.org/10.3390/electronics9040617

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A 28 GHz Linear Power Amplifier Based on CPW Matching Networks with Series-Connected DC-Blocking Capacitors

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